A New Single-Input Multioutput Interleaved High Step-Up DC-DC Converter for Sustainable Energy Applications

In this article, a new single-input multioutput high step-up dc-dc converter is proposed, which is suitable for sustainable energy applications. Basically, the presented converter consists of an interleaved and a modified single-ended primary inductor converter, which uses coupled-inductor and switched-capacitor-voltage-multiplier techniques. Each stage generates a different output voltage using only one input voltage source and one duty ratio. The output voltage gains are effectively increased at low duty ratios by employing coupled-inductors and voltage multiplier cells. Moreover, because of using low voltage rated MOSFETs, the voltage stresses on power switches are very low. Therefore, the conduction losses are reduced and the conversion efficiency will be improved. In order to lighten the reverse recovery problems of the output diodes, the leakage inductance of the coupled inductors can be beneficial. The maximum efficiency that is achieved by the proposed converter is 97.5% and 96.2%, respectively, for both output loads. The operating principles and steady-state analysis are discussed in detail. Finally, experimental results for a prototype of the proposed topology that is implemented under 24 V for input voltage source, 286 and 390 V, respectively, for both output ports are presented to assess the effectiveness of the proposed converter.